You searched for: “arthropoda
Phylum 20, Arthropoda
An arthropod's a boneless creature
Whose chief diagnostic feature
Is its jointed legs: that is,
Articulate appendages.
Arthro, joint, affixed to pod,
Makes a name correct, though odd.

This entry is located in the following unit: Zoology Phyla in Poetic Rhyming + (page 2)